When Northwood students enter the Griswold Lecture Hall to hear Darvish and othersspeak, they find on each chair a sealed envelope marked “Do not open.” During her talk, she asks them to see what’s inside. Two things are: a blank thank-you card and dollar coin.

Of the first, Darvish asks the students: “When was the last time you sent a thank-you note? Not a text or an email, but an actual note that’s put in the mail? Use this one to thank someone for what they’ve done.”

She suggests parents as worthy recipients.

The second item represents the fact that half of the world’s population lives on $1 a day, Darvish says, urging the audience to help the needy.

“Giving back is so important. You can’t survive in a community if you don’t feel the pain when people are hurting and share the joy when they are thriving,” she says.

“Sometimes we may ruffle feathers, but auto dealers are generous. You need to do more than just thrive as an entrepreneur.”